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From:   Matthew Wilcox <willy@infradead.org>
To:     linux-kernel@vger.kernel.org
Cc:     Matthew Wilcox <mawilcox@microsoft.com>, linux-mm@kvack.org,
        linux-fsdevel@vger.kernel.org,
        linux-f2fs-devel@lists.sourceforge.net,
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        Bjorn Andersson <bjorn.andersson@linaro.org>,
        Stefano Stabellini <sstabellini@kernel.org>,
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        David Howells <dhowells@redhat.com>
Subject: [PATCH v6 35/99] mm: Convert __do_page_cache_readahead to XArray
Date:   Wed, 17 Jan 2018 12:20:59 -0800
Message-Id: <20180117202203.19756-36-willy@infradead.org>
In-Reply-To: <20180117202203.19756-1-willy@infradead.org>
References: <20180117202203.19756-1-willy@infradead.org>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

From: Matthew Wilcox <mawilcox@microsoft.com>

This one is trivial.

Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com>
---
 mm/readahead.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/mm/readahead.c b/mm/readahead.c
index f64b31b3a84a..66bcaffd47f0 100644
--- a/mm/readahead.c
+++ b/mm/readahead.c
@@ -174,9 +174,7 @@ int __do_page_cache_readahead(struct address_space *mapping, struct file *filp,
 		if (page_offset > end_index)
 			break;
 
-		rcu_read_lock();
-		page = radix_tree_lookup(&mapping->pages, page_offset);
-		rcu_read_unlock();
+		page = xa_load(&mapping->pages, page_offset);
 		if (page && !xa_is_value(page))
 			continue;
 
-- 
2.15.1